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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Toronto Post Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Environment Canada has issued a cold weather alert for Toronto with wind chill values near –35°C overnight. This is the second such alert this season, triggered by an Arctic air mass settling over southern Ontario.
What does a Toronto cold weather alert mean?
When wind chill reaches –30°C or lower, the alert warns of frostbite risk on exposed skin within minutes. Toronto’s Medical Officer of Health activates warming centres and outreach services. The current alert extends through Wednesday morning, with daytime highs around –15°C.
How does this compare to other winter warnings?
While a snowfall warning toronto tomorrow is not in effect, a separate toronto weather warning today for extreme cold remains active. No tornado warning today toronto has been issued – those are rare in winter. A toronto weather alert tomorrow may continue if the cold holds, and a broader toronto weather warning this week could expand if additional snow arrives.
What should I do during a cold weather alert?
Stay indoors if possible. Dress in layers, cover all exposed skin, and avoid strenuous outdoor activity. Check on vulnerable neighbours and limit time with pets outside. Warming centres are open at several city locations.
How long will this cold spell last?
The Arctic air is expected to remain over the region until Thursday, when a milder Pacific system moves in. Temperatures may temporarily rise above –10°C by Friday, but another toronto weather alert tomorrow could follow if conditions shift.
Are frostbite and hypothermia warnings included?
Yes – the alert explicitly warns that exposed skin can freeze in under 10 minutes. Health Canada recommends frequent indoor breaks and warm, non-alcoholic drinks. For more safety tips, see our Canada weather hub.